The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A049571 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A049571

Primes p such that x^39 = 2 has a solution mod p.
(history; published version)

#15 by Charles R Greathouse IV at Thu Sep 08 08:44:58 EDT 2022

PROG

(MAGMAMagma) [p: p in PrimesUpTo(500) | exists(t){x : x in ResidueClassRing(p) | x^39 eq 2}]; // Vincenzo Librandi, Sep 14 2012

Discussion

Thu Sep 08

08:44

OEIS Server: https://oeis.org/edit/global/2944

#14 by Jon E. Schoenfield at Fri Mar 06 23:55:16 EST 2020

STATUS

editing

approved

#13 by Jon E. Schoenfield at Fri Mar 06 23:54:52 EST 2020

AUTHOR

N. J. A. Sloane.

STATUS

approved

editing

#12 by Joerg Arndt at Fri Sep 14 04:57:57 EDT 2012

STATUS

proposed

approved

#11 by Vincenzo Librandi at Fri Sep 14 04:48:02 EDT 2012

STATUS

editing

proposed

#10 by Vincenzo Librandi at Fri Sep 14 04:47:51 EDT 2012

COMMENTS

Complement of A059350 relative to A000040. - Vincenzo Librandi, Sep 14 2012

MATHEMATICA

ok[p_]:= Reduce[Mod[x^39 - 2, p] == 0, x, Integers] =!= False; Select[Prime[Range[100]], ok] (* Vincenzo Librandi, Sep 14 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(500) | exists(t){x : x in ResidueClassRing(p) | x^39 eq 2}]; // Vincenzo Librandi, Sep 14 2012

CROSSREFS

Cf. A000040, A059350.

KEYWORD

nonn,easy

STATUS

approved

editing

#9 by Russ Cox at Fri Mar 30 16:48:35 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com)_.

Discussion

Fri Mar 30

16:48

OEIS Server: https://oeis.org/edit/global/110

#8 by Russ Cox at Sun Jul 10 18:38:00 EDT 2011

LINKS

<a href="/Sindx_index/Pri.html#smp">Index entries for related sequences</a>

Discussion

Sun Jul 10

18:38

OEIS Server: https://oeis.org/edit/global/72

#7 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

R. J. Mathar, <a href="/A049571/b049571.txt">Table of n, a(n) for n = 1..1000</a>

<a href="/Sindx_Pri.html#smp">Index entries for related sequences</a>

KEYWORD

nonn,new

nonn

#6 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

LINKS

R. J. Mathar, <a href="http://research.att.com/~njas/sequences/b049571.txt">Table of n, a(n) for n = 1..1000</a>

KEYWORD

nonn,new

nonn